/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.coyote.http11.upgrade;

import org.apache.tomcat.jni.Socket;
import org.apache.tomcat.jni.Status;
import org.apache.tomcat.util.net.SocketWrapper;

import java.io.IOException;

/**
 * @deprecated Will be removed in Tomcat 8.0.x.
 */
@Deprecated
public class UpgradeAprProcessor extends UpgradeProcessor<Long> {

	private final long socket;

	public UpgradeAprProcessor(SocketWrapper<Long> wrapper,
	                           UpgradeInbound upgradeInbound) {
		super(upgradeInbound);

		Socket.timeoutSet(wrapper.getSocket().longValue(),
				upgradeInbound.getReadTimeout());

		this.socket = wrapper.getSocket().longValue();
	}

	/*
	 * Output methods
	 */
	@Override
	public void flush() throws IOException {
		// NOOP
	}

	@Override
	public void write(int b) throws IOException {
		int result = Socket.send(socket, new byte[]{(byte) b}, 0, 1);
		if (result != 1) {
			throw new IOException(sm.getString("apr.write.error",
					Integer.valueOf(-result)));
		}
	}

	@Override
	public void write(byte[] b, int off, int len) throws IOException {
		int result = Socket.send(socket, b, off, len);
		if (result != len) {
			throw new IOException(sm.getString("apr.write.error",
					Integer.valueOf(-result)));
		}
	}

	/*
	 * Input methods
	 */
	@Override
	public int read() throws IOException {
		byte[] bytes = new byte[1];
		int result = Socket.recv(socket, bytes, 0, 1);
		if (result == -1) {
			return -1;
		} else {
			return bytes[0] & 0xFF;
		}
	}

	@Override
	public int read(boolean block, byte[] bytes, int off, int len)
			throws IOException {
		if (!block) {
			Socket.optSet(socket, Socket.APR_SO_NONBLOCK, -1);
		}
		try {
			int result = Socket.recv(socket, bytes, off, len);
			if (result > 0) {
				return result;
			} else if (-result == Status.EAGAIN) {
				return 0;
			} else {
				throw new IOException(sm.getString("apr.read.error",
						Integer.valueOf(-result)));
			}
		} finally {
			if (!block) {
				Socket.optSet(socket, Socket.APR_SO_NONBLOCK, 0);
			}
		}
	}
}
